The 2018 GT Series Sprint Cup (known for sponsorship reasons as the 2018 Blancpain GT Series Sprint Cup) was the sixth season of the GT Series Sprint Cup following on from the demise of the SRO Motorsports Group's FIA GT1 World Championship (an auto racing series for grand tourer cars), the fifth with the seasons sponsored by Blancpain. The season began on 7 April at Zolder and ended on 16 September at the Nürburgring.